DUCT AS-AIR 2061818 - Caterpillar

Illustration 2 g00578120
(6) Seal ring face. (7) Seal ring ramp. (8) Installation tool. (9) Seal ring retaining lip.
Use caution when you are using isopropyl alcohol. Avoid prolonged skin contact with isopropyl alcohol.Vapors may be harmful if inhaled. Use only in a well ventilated area. Do not smoke while using isopropyl alcohol.Isopropyl alcohol is flammable. Do not use near an open flame or near welding operations. Keep isopropyl alcohol away from heated surfaces exceeding 482°C (900°F).
Remove any oily film, dust or other foreign matter from all of the seal components. Use isopropyl alcohol and a clean cloth that is free of lint to clean the components. Note: All components should be completely dry prior to proceeding. Do not allow oil to contact toric ring (1), housing ramp (4) or seal ring ramp (7) before both seal rings (2) are assembled in Step 11.
Illustration 3 g00578163
Illustration 4 g00578169
Position toric ring (1) on seal ring (2). Make sure that toric ring (1) is at the bottom of seal ring ramp (7) and against seal ring retaining lip (9). Note: Make sure that toric ring (1) is straight on seal ring (2). There must not be a twist in toric ring (1). Handle toric ring (1) carefully. Nicks, cuts and scratches can cause leaks.
Illustration 5 g00578174
Position installation tool (8) on seal ring (2) with toric ring (1).
Lightly dampen the lower half of toric ring (1) with isopropyl alcohol. Techniques that can be used to dampen toric ring (1) include wiping with a clean cloth that is free of lint. Toric ring (1) can also be dipped into a container with towels or with a foam mat that is saturated with isopropyl alcohol. Note: Do not use Stanisol or any other liquid that evaporates slowly. Do not use a liquid that leaves an oily film.
Illustration 6 g00578229
Make sure that the lower half of toric ring (1) is still wet. Use installation tool (8) to position seal ring (2) and toric ring (1) squarely against seal ring housing (5) and under housing retaining lip (3) of seal ring housing (5), as shown.
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Measure dimension (A) from seal ring face (6) to the top surface of seal ring housing (5). Check dimension (A) in at least four places (90 degree intervals). The measurements must not differ by more than 1 mm (0.04 inch). Note: If small adjustments are necessary, do not push seal ring (2) directly and do not pull seal ring (2) directly. Use installation tool (8).
Toric ring (1) can twist if the toric ring is not completely wet during installation. Burrs on housing retaining lip (3) or on seal ring housing (5) can also cause a twist.
Misalignments, twists and bulges of the toric ring will cause Duo-Cone seal failures. If any of these occur, perform the assembly process over from the beginning.
Toric ring (1) must never slip on housing ramp (4) or seal ring ramp (7). To prevent slippage, allow adequate time for evaporation to occur before you proceed with the assembly process. Toric ring (1) must roll